Posted: Wed Oct 23, 2019 20:37 Post subject: TP-Link Archer C7 (v4) AC-wifi speed drops w/ security
I was successful with installing DD-WRT. I reset the router to default settings and if I connect to the WiFi while unsecured I get full expected throughput of the AC wireless (1300 I believe?). Once I add on WPA2 security the speed drops. I can't get anything better than Wifi G speeds with it. My devices are right next to the router, so it isn't a distance thing.
As mentioned above, everything is set to default. I've tried playing around with the settings, manually selecting channel (153), settling the wifi mode to only N/AC Mixed, setting the channel width to 80 MHz, etc. Nothing works except removing security.
Any ideas on what I can do?
Thanks in advance.
Edit: I enabled AES transmission for the security. This seems to have fixed it. Sorry for the wasted post
This is the reason why most users don't get AC/N speeds. Channel width, security, Short GI, Short Preamble, clear channel selected (don't use Auto). _________________ Before asking a question on the forums, update dd-wrt: Where do I download firmware? I suggest reading it all.
QCA Best WiFi Settings
Some dd-wrt wiki pages are up to date, others are not. PM me if you find an old one.
Atheros:
Netgear R7800 x3 - WDS AP / station, gateway, QoS
TP-Link Archer C7 v2 x2 - WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - NU
D-Link 615 C1/E3/I1 x 7 - 1 WDS station
D-Link 825 B1 - NU
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - NU
UBNT loco M2 x2 - airOS
Broadcom
Linksys EA6400 - Gateway, QoS
Asus N66U - AP
Netgear WNDR3700v3 - not used
MediaTek
UBNT EdgeRouter X - switch
This is the reason why most users don't get AC/N speeds. Channel width, security, Short GI, Short Preamble, clear channel selected (don't use Auto).
So, when I select the default 20 MHz channel width, ddwrt reports a transfer rate of 289 mbps. My laptop (Surface Pro 3) is able to get the max speedtest results for my connection (100/100), but network transfer speeds don't go higher than 120 mbps.
If I select the HT40 40 Mhz option, ddwrt reports a transfer rate of 600 mbps. My laptop is able to get the max speedtest results and network transfer rates are around 300 mbps.
If I select the VHT80 80 MHz option, ddwrt reports a transfer rate of 1300 mbps. My laptop does no where near proper transfer rates. Speedtest results are like 40/9 and network transfer speeds are below 8 mbps.
Posted: Thu Oct 31, 2019 20:22 Post subject: Re: Recommended Settings
chewyfood wrote:
So, when I select the default 20 MHz channel width, ddwrt reports a transfer rate of 289 mbps. My laptop (Surface Pro 3) is able to get the max speedtest results for my connection (100/100), but network transfer speeds don't go higher than 120 mbps.
If I select the HT40 40 Mhz option, ddwrt reports a transfer rate of 600 mbps. My laptop is able to get the max speedtest results and network transfer rates are around 300 mbps.
If I select the VHT80 80 MHz option, ddwrt reports a transfer rate of 1300 mbps. My laptop does no where near proper transfer rates. Speedtest results are like 40/9 and network transfer speeds are below 8 mbps.
some wifi adapters have issue with 80Mhz if the channel is not set to 36 (to use channel up to 48 ) so you should set the channel to 36 for testing, or do not work with 80 Mhz "fat" channel at all or use a instead of n/ac. And the Marvell chips on the surface are known for bad performance with theoretical max of 866mbps but real word much less
